The incident at around 7:30 am local time on Monday involved a flame originating from under the insulation of a high pressure cleaning unit on the platform, according to regulator Canada-Newfoundland & Labrador Offshore Petroleum Board (CNLOPB).

The provincial regulator said that two workers observed the flame and immediately shut down the cleaning unit.

"A portable extinguisher was used to quickly extinguish the flame," CNLOPB said in a statement.

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